Fouled Ruger Precision Rifle (RPR) Barrel

“This is a Ruger Precision Rifle barrel that has about 2800 rounds through it. It has been cleaned on regular basis but I did not do a good job of it. I used to get 1/2″ grouping at 200 yards but not any more. I cleaned it twice with Sweets. Left the sweets in the bore for about 10 minutes then brushed it for 5 minutes (about 300 strokes) the copper build up did not go away. Please watch the video to get a better idea.”

Before Sharp Shooter Wipe-Out

After Sharp Shooter-Wipe Out

“This is the result of using SharpShoot-R to clean badly fouled barrel. The barrel has about 2800 rounds through it. I did clean it on regular bases but obviously did not do a good job of it. This used to shoot 1/2″ groups at 200 yards, but lately I have been having trouble with the grouping.

I am hoping by getting the barrel cleaned I can get the grouping back. In another video I will update on how the grouping has tuned out.

I applied WIPE-OUT and let it set for 2 hours. I was amazed with how much blue came out. I put a second application and let it set for 8 hours. After I patched the barrel out with a couple of patches. I took the video

The rifle will now put 5 shots in under an inch at 100 yds. I am really happy with how Sharp ShooterWipeout has cleaned the barrel.”

TO : Edward (George) Gorginian

Firstly, I want you to shoot the rifle BEFORE you put anything else in the barrel. I think you will be pleased with the result..

I want to explain to you what you are looking at in the rifle barrel. The cracking you see in the throat area is commonly known as “throat erosion” . THROAT EROSION happens when flame temperatures and pressure get quite high. It is here in the throat that your barrel “wears out”, not at the muzzle.

Those cracks and fissures are caused (1)in part by shooting the gun rapidly without letting the barrel properly cool. Also (2)the flame temperatures are much higher on some brands of powder. Together these two elements are responsible for decreased barrel performance along with a large number of rounds thru the barrel. Improper cleaning the barrel allows fouling to build up in layers further contribution to decreased accuracy.

The barrel should be thoroughly cleaned after every shooting session. If it were my rifle I would think it a good idea to clean, at least every 40 rounds or so. This should do a great deal in promotion barrel longevity.

Additionally what you are seeing in the barrel are “tool marks” that occur in the barrel making process. Some barrels can be very rough and copper foul considerably…..that does not mean they are inaccurate. It simply means they will need to be cleaned more often.

If the accuracy is gone from this barrel, the solution would be (A) buy a new barrel or (B) cut 1 1/2 inches off this barrel and rechamber it.

It is common for BENCH REST RIFLES to completely wear out a barrel in around 2000 rounds. I would also like to know what caliber the rifle is and what ammunition you are using. We may be able to help a bit there as well.
PATCH-OUT will dissolve COPPER, CARBON, and POWDER FOULING without brushing.
Terry Paul

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